FIR filters

Collaboration diagram for FIR filters:

Classes
class	SPUC::cic< Numeric >
	class for CIC digital filter More...
class	SPUC::farrow< Numeric >
	Template Class for Farrow implementation of a ploynomial interpolation using a FIR filter. More...
class	SPUC::fir< Numeric, Coeff >
	Template Class for Modeling a Finite Impulse Response filter. More...
class	SPUC::fir_adapt< Numeric, Coeff >
	template class fir_adapt Based on FIR class, created to support LMS adaptive filtering More...
class	SPUC::fir_coeff< Numeric >
	Template Class for Modeling a Finite Impulse Response filter. More...
class	SPUC::fir_decim< Numeric, Coeff >
	template class for fir decimation based on FIR class More...
class	SPUC::fir_interp< Numeric, Coeff >
	template class fir_decim based on FIR class More...
class	SPUC::lagrange< Numeric, Coeff >
	Template Lagrange interpolation via FIR Fitler. More...
class	SPUC::remez_fir
	template Remez_fir class More...
class	SPUC::running_average< Numeric >
	template class running average filter consisting of a delay line, adder and subtractor More...
class	SPUC::running_sum< Numeric >
	template class running average filter consisting of a delay line, adder and subtractor More...
class	SPUC::scic< Numeric >
	Implementation for sharped cascaded integrator comb filter. More...
class	SPUC::sum_and_dump< Numeric >
	sum and dump filter More...

Functions
void	SPUC::butterworth_fir (fir_coeff< float_type > &butfir, float_type spb)
	Calculate coefficients for FIR assuming butterworth frequency response. More...
void	SPUC::create_remez_lpfir (fir_coeff< float_type > &remezfir, float_type pass_edge, float_type stop_edge, float_type stop_weight)
	calculates the coefficients for lowpass FIR based on Remez constraints More...
std::vector< float_type >	SPUC::inv_dft_symmetric (const std::vector< float_type > &A, int N)
	Calculate coefficients for FIR using frequency sampling IDFT. More...
void	SPUC::gaussian_fir (fir_coeff< float_type > &gaussf, float_type bt, float_type spb)
	Calculate coefficients for FIR assuming gaussian frequency response. More...
template<class T >
void	SPUC::root_raised_cosine (fir_coeff< T > &rcfir, float_type alpha, int rate)
template<>
void	SPUC::root_raised_cosine_quantized (fir_coeff< long > &rcfir, float_type alpha, int rate, int bits, float_type scale)
template<>
void	SPUC::root_raised_cosine_quantized (fir_coeff< float > &rcfir, float_type alpha, int rate, int bits, float_type scale)
template<>
void	SPUC::root_raised_cosine_quantized (fir_coeff< int > &rcfir, float_type alpha, int rate, int bits, float_type scale)
template<>
void	SPUC::root_raised_cosine_quantized (fir_coeff< double > &rcfir, float_type alpha, int rate, int bits, float_type scale)
float_type	SPUC::io (float_type x)
	bessel function for kaiser window More...
std::vector< float_type >	SPUC::hamming (long nf, float_type alpha, float_type beta)
	hamming window More...
std::vector< float_type >	SPUC::hanning (long nf)
	hanning window More...
std::vector< float_type >	SPUC::blackman (long nf)
	Blackman Window . More...
std::vector< float_type >	SPUC::kaiser (long nf, float_type beta)
	kaiser window More...
std::vector< float_type >	SPUC::cheby (long nf, long n, long ieo, float_type dp, float_type df, float_type x0)
	dolph chebyshev window design More...
void	SPUC::chebc (float_type nf, float_type dp, float_type df, float_type n, float_type x0)
	chebyshev window subroutine to generate chebyshev window parameters when one of the three parameters nf,dp and df is unspecified??? More...

Detailed Description

Function Documentation

std::vector< float_type > SPUC::blackman

(

long

nf

)

Blackman Window .

Author

Tony Kirke

References SPUC::cos(), and TWOPI.

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void SPUC::butterworth_fir	(	fir_coeff< float_type > &	butfir,
		float_type	spb
	)

Calculate coefficients for FIR assuming butterworth frequency response.

Author

Tony Kirke, Copyright(c) 2001

Tony Kirke

References SPUC::fir_coeff< Numeric >::coeff, SPUC::cos(), SPUC::exp(), SPUC::fir_coeff< Numeric >::num_taps, PI, SPUC::sqrt(), and TWOPI.

Referenced by main().

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void SPUC::chebc	(	float_type	nf,
		float_type	dp,
		float_type	df,
		float_type	n,
		float_type	x0
	)

chebyshev window subroutine to generate chebyshev window parameters when one of the three parameters nf,dp and df is unspecified???

chebyshev window

subroutine to generate chebyshev window parameters when one of the three parameters nf,dp and df is unspecified

Author

Tony Kirke

References SPUC::cos(), SPUC::cosh(), SPUC::coshin(), PI, and TWOPI.

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std::vector< float_type > SPUC::cheby	(	long	nf,
		long	n,
		long	ieo,
		float_type	dp,
		float_type	df,
		float_type	x0
	)

dolph chebyshev window design

Author

Tony Kirke

References SPUC::cos(), SPUC::cosh(), SPUC::coshin(), SPUC::expj(), PI, and TWOPI.

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void SPUC::create_remez_lpfir	(	fir_coeff< float_type > &	remezfir,
		float_type	edge,
		float_type	fx,
		float_type	wtx
	)

calculates the coefficients for lowpass FIR based on Remez constraints

Calculate coefficients for lowpass FIR assuming equiripple frequency response.

Author

Tony Kirke, Copyright(c) 2001

Tony Kirke

References SPUC::fir_coeff< Numeric >::num_taps, SPUC::remez_fir::remez(), and SPUC::fir_coeff< Numeric >::settap().

Referenced by main().

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void SPUC::gaussian_fir	(	fir_coeff< float_type > &	gaussf,
		float_type	bt,
		float_type	spb
	)

Calculate coefficients for FIR assuming gaussian frequency response.

Author

Tony Kirke, Copyright(c) 2001

Tony Kirke

References SPUC::fir_coeff< Numeric >::coeff, SPUC::exp(), SPUC::fir_coeff< Numeric >::num_taps, SPUC::sqrt(), and TWOPI.

Referenced by main().

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std::vector< float_type > SPUC::hamming	(	long	nf,
		float_type	alpha,
		float_type	beta
	)

hamming window

Author

Tony Kirke

References SPUC::cos(), and TWOPI.

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std::vector< float_type > SPUC::hanning

(

long

nf

)

hanning window

Author

Tony Kirke

References SPUC::cos(), and TWOPI.

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std::vector< float_type > SPUC::inv_dft_symmetric	(	const std::vector< float_type > &	A,
		int	N
	)

Calculate coefficients for FIR using frequency sampling IDFT.

Author

Tony Kirke, Copyright(c) 2001

Tony Kirke

References SPUC::cos(), M, and TWOPI.

Referenced by SPUC::remez_fir::remez().

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float_type SPUC::io

(

float_type

x

)

bessel function for kaiser window

Author

Tony Kirke, Copyright(c) 2001 function: io

Tony Kirke

Referenced by SPUC::kaiser().

std::vector< float_type > SPUC::kaiser	(	long	nf,
		float_type	beta
	)

kaiser window

Author

Tony Kirke

References SPUC::io(), and SPUC::sqrt().

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template<class T >

void SPUC::root_raised_cosine	(	fir_coeff< T > &	rcfir,
		float_type	alpha,
		int	rate
	)

Author

Tony Kirke

References SPUC::fir_coeff< Numeric >::coeff, SPUC::fir_coeff< Numeric >::num_taps, and SPUC::root_raised_cosine_imp().

Referenced by SPUC::qam_tx< float_type >::loop_init(), SPUC::quad_data< float_type >::quad_data(), and SPUC::sim_qam< Numeric >::sim_qam().

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template<>

void SPUC::root_raised_cosine_quantized	(	fir_coeff< long > &	rcfir,
		float_type	alpha,
		int	rate,
		int	bits,
		float_type	scale
	)

References SPUC::fir_coeff< Numeric >::coeff, SPUC::fir_coeff< Numeric >::num_taps, SPUC::root_raised_cosine_imp(), and SPUC_TOLONG.

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template<>

void SPUC::root_raised_cosine_quantized	(	fir_coeff< float > &	rcfir,
		float_type	alpha,
		int	rate,
		int	bits,
		float_type	scale
	)

References SPUC::fir_coeff< Numeric >::coeff, SPUC::fir_coeff< Numeric >::num_taps, and SPUC::root_raised_cosine_imp().

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template<>

void SPUC::root_raised_cosine_quantized	(	fir_coeff< int > &	rcfir,
		float_type	alpha,
		int	rate,
		int	bits,
		float_type	scale
	)

References SPUC::fir_coeff< Numeric >::coeff, SPUC::fir_coeff< Numeric >::num_taps, SPUC::root_raised_cosine_imp(), and SPUC_TOINT.

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template<>

void SPUC::root_raised_cosine_quantized	(	fir_coeff< double > &	rcfir,
		float_type	alpha,
		int	rate,
		int	bits,
		float_type	scale
	)

References SPUC::fir_coeff< Numeric >::coeff, SPUC::fir_coeff< Numeric >::num_taps, and SPUC::root_raised_cosine_imp().

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